3-(hydroxymethyl)chromones

ABSTRACT

THE PRESENT INVENTION RELATES TO COMPOUNDS OF TYPE I:   3-(HO-CH2-),4-(O=),R1,R2-CHROMAN   WHEREIN R1 AND R2 ARE HYDROGEN, HALOGEN, ALKYL, ARALKYL, ARYL, ALKOXY, ACYLAMINO, HYDROXY, OR TAKEN TOGETHER R1 AND R2 FROM AN AROMATIC RING. THESE COMPOUNDS ARE PREPARED FROM THE CORRESPONDING O-HYDROXY-$(METHYLSULFINYL)ACETOPHENONES. THESE COMPOUNDS ARE USEFUL IN ALLEVIATING ALLERGIC MANIFESTATIONS.

United States Patent US. Cl. 260345.2 26 Claims ABSTRACT OF THE DISCLOSURE The present invention relates to compounds of type I:

CHzOH R1 I J R: I wherein R and R are hydrogen, halogen, alkyl, aralkyl, aryl, alkoxy, acylamino, hydroxy, or taken together R and R form an aromatic ring. These compounds are prepared from the corresponding o-hydroxy-w-(methylsulfinyl)acetophenones. These compounds are useful in alleviating allergic manifestations.

This application is a continuation-in-part of our copending application, Ser. No. 112,765, filed Feb. 4, 1971, now abandoned.

The present invention relates to B-(hydroX'ymethyDchIomones having the following structural formula:

CHQOH R1 R, O I

wherein R and R each represent hydrogen, halogen, alkyl, aralkyl, aryl, alkoxy, acylamino, hydroxy or, taken together, R and R form an aromatic ring.

The present invention also includes within its scope novel processes for the production of these 3-(hydroxymethyl)chromones.

As used throughout the specification and claims, the term alkyl and the alkyl portion of alkoxy embraces both straight and branched alkyl radicals containing from 1 to 8 carbon atoms; for example, methyl, ethyl, propyl, isopropyl, n-butyl, n-amyl, n-hexyl, Z-ethylbutyl, 2,3-dimethylbutyl, and the like. The term halogen" encompasses fiuorine, bromine, chlorine and iodine. The term aryl denotes an aromatic hydrocarbon of 6 to 8 carbon atoms such as phenyl, tolyl and the like. The term aralkyl encompasses alkyl groups in which aryl as previously defined is substituted for a hydrogen atom, such as for example benzyl, phenethyl, and the like. The term acyl means radicals of those hydrocarbon carboxylic acids of less than 12 carbon atoms as exemplified by the lower alkanoic acid, e.g., acetic, propionic, butyric, the aryl carboxylic acid, e.g., benzoic and toluic acid and the like.

The compounds of this invention are active orally or by injection in preventing the allergic and asthmatic reactions in mammals such as cats, dogs, guinea pigs and the like. Thus, for example, in tests conducted according to the procedures described in Life Sciences, 7, 465 (1963), and in Proc. Soc. Exptl. Biol. Med., 81, 584 (1952), the compounds of this invention when administered to the respective animals such as rats and guinea pigs at a dose of about 5 to 100 mg./kg. are capable of alleviating allergic and asthmatic conditions in these animals.

The compounds of this invention are useful in providing symptomatic relief of allergic conditions such as asthma, hay fever and the like. Generally speaking, these compounds are administered orally, by injection or in the form of an Aerosol spray at a dose of about 5 to 100 mg./kg.

In order to use these compounds they are formulated with known pharmaceutical diluents such as water, lactose, powdered sugar, mannitol and the like into dosage forms such as tablets, capsules, and the like.

According to the present invention, these compounds are prepared by a reaction as represented in the following scheme:

9 E g cmon Cm 2011.0 A R R1 SCH; base CH:SOH on 0 R1 R2 III 11 o omon a The desired Compounds I are obtained from o-hydroxyw-(methylsulfinyl) acetophenones with or without isolation of the intermediate Compounds II.

The starting Compounds III are prepared by the reaction of salicylic esters with sodium methylsulfinyl carbanion generated by the action of sodium hydride on dimethyl sulfoxide. A similar preparation of Compound III (R and R =H) has been reported. Becker, et al. JACS. 3410 (1963).

In order to further illustrate the practice of the invention the following examples are included:

EXAMPLE 1 s rt.

CHZOH o 3-(hydroxymethyl)-3-(methylsulfinyl)-4-chromanone A quantity of 24.3 g. (0.3 mole) of 37% aqueous formaldehyde solution was added all at once to a stirred, warm (40 C.) solution of 29.7 g. (0.15 mole) of 2'- hydroxy-Z-(methylsulfinyl) acetophenone, g. potassium carbonate and 600 ml. of water. After one minute turbidity developed as an oil separated. The mixture was allowed to cool slowly over a period of one-half an hour. The oil was extracted into five liters of ether and the solution was dried (K CO filtered and concentrated to give 25.0 (69.4%) of a viscous oil N 1.5868.

Analysis.Calcd. for C H O S (percent): C, 54,99; H, 5.03; S, 13.34. Found (percent): C, 55.06; H, 5.15; S,

3 EXAMPLE 2 CHIOH o 3- (hydroxymethyl) chromone A solution of 14.0 'g. (0.058 mole) of 3-(hydroxymethyl)-3-(methylsulfinyl)-4-chromanone in 30 ml. of toluene was refluxed vigorously for 10 minutes. The cooled solution yielded 5.1 g. (49.5%) of pale yellow crystals, M.P. 108-110 C. Pure material, M.P. 109-111" C., was obtained by recrystallization from ethyl acetate-petroleum ether.

Analysis.-Calcd. for C H O (percent): C, 68.18; H, 4.58. Found (percent): C, 68.20; H, 4.68.

EXAMPLE 3 OH: OH

SCH: ii

6-hydroxy-3-(hydroxymethyl)-3-(methylsulfinyl)-4- chromanone This compound was prepared by reacting 8.56 g. of 2,5'-dihydroxy-2-(methylsulfinyl)acetophenone with 20 ml. of formalin in analogous fashion to 3-(hydroxymethyl)-3-(methylsulfinyl)-4-chromanone. The material was recrystallized from methanol, M.P. 156-60 C.; yield 1 g. (10%).v

Analysis.-Calcd. for C H O S (percent): C, 51.55; H, 4.72; S, 12.51. Found (percent): C, 51.73; H, 4.78; S, 12.30.

EXAMPLE 4 H0 cmon 6-hydroxy-3- (hydroxymethyl chromone This was prepared by boiling the 6-hydroxy-3-(hydroxymethyl) -3- (methylsulfinyl) -4-chr0manone obtained from 10.56 g. of 2',5'-dihydroxy-2-(methylsulfinyl) acetophenone in 200 ml. of xylene for 15 min. The mixture Was chilled, the solid filtered olf and recrystallized from CH OH, M.P. 215-l8.5 0.; yield 0.5 g. (5.2%).

Analysis.Calcd. for C H O (percent): C, 62.50; H, 4.20. Found (percent): C, 62.48; H, 4.32.

EXAMPLE 5 6-chloro-3- (hydroxymethyl -3- (methylsulfinyl) -4- chromanone 0 ion.

CHaOH 4 EXAMPLE 6 To a solution of 40 g. of K CO in 200 ml. of H 0 was added with stirring 14 g. of 5'-chloro-2'-hydroxy-2- (methylsulfinyl) acetophenone. The yellow solution that formed was then treated with stirring with 34 m1. of formalin. On further stirring an oil precipitated which solidified. The mixture was chilled, and the precipitate was filtered off and washed with cold H O. The precipitate was suspended in 300 ml. of xylene and the mixture boiled for /2 hour with charcoal. The mixture was filtered hot and on cooling crystals formed in the filtrate. These crystals were filtered off and recrystallized from absolute ethanol, M.P. l63-64; yield '6 g. (49%).

Analysis.-Calcd. for C1oH1C1O3 (percent): C, 57.03; H, 3.35. Found (percent): C, 57.00; H, 3.23.

EXAMPLE 7 7 CHaOH 3-(hydroxymethyl)-=6-iodo-3-(methylsulfinyl)- 4-chromanone 3-(hydroxymethyl)-6-iodochromone This was prepared by reacting a solution of 20 g. of 2' hydroxy 5 iodo 2 (methylsulfinyl)acetophenone in 200 ml. of H 0 containing 40 g. of K CO with 34 ml. of formalin in analogous fashion to 6-ch1oro-3- (hydroxymethyl)chromone. The material was recrystallized from absolute ethanol, M.P. 134-37; yield 5 g. (27.5%).

Analysis.Calcd. for C10H7 I03 (percent): C, 39.76; H, 2.34. Found (percent): C, 39.88; H, 2.40.

EXAMPLE 9 CHzOH SC ll 3- (hydroxymethyl) -6-methoxy-3 (methylsulfinyl) 4-chromanone This was prepared by reacting a solution of 14 g. of 2 hydroxy 5' methoxy 2 (methylsulfinyhaceto.

phenone in 200 ml. of H containing 40 g. of K CO with 34 ml. of formalin in analogous fashion to 6-chloro- 3 (hydroxymethyl)-3-(methylsulfinyDchromanone. The material was recrystallized from acetone, M.P. 107-1 10 C.; yield 4 g. (25% Analysis.Calcd. for C H O S (percent): C, 53.32; H, 5.22; S, 11.86. Found (percent): C, 53.53; H, 5.22; S, 11.78.

EXAMPLE cmo '-omo11 3- (hydroxymethyl) fi-methoxychrornone This material was prepared by reacting a solution of 7 g. of 2'-hydroxy-5methoxy-2-(methylsulfinyl) -acetophenone in 100 ml. of H 0 containing 20 g. of K CO with 17 ml. of formalin in analogous fashion to 6-chloro- 3-(hydroxymethyl) chromone. The material was recrystallized from absolute ethanol, M.P. 15053.5; yield 3.5 g. (56%).

Analysis.-Calcd. for C H O (percent): C, 64.07; H, 4.89. Found (percent): C, 64.21; H, 4.86.

EXAMPLE 11 CHzOH 6-bromo-3- (hydroxy-methyl) -3- (methylsulfinyl) 4-chromanone.

EXAMPLE 12 Br CHaOH 6-bromo-3 (hydroxymethyl) chromone To a solution of 15.6 g. of K CO in 78 ml. of H 0 is added 6.5 g. of 4'-bromo-2'-hydroxy-2- (methylsulfinyl) acetophenone. The resulting solution was then treated with stirring with 13.3 g. of formalin. After several minutes of stirring, an oil precipitated which solidified on continued stirring. The mixture is chilled and the precipitate filtered and washed with cold H O. The precipitate was then suspended in 50 ml. of xylene and the mixture boiled for /2 hr. The resulting solution was cooled and the crystals that formed were filtered and recrystallized from absolute ethanol with the aid of charcoal, M-P. 15458; yield 1 g. (17%).

Analysis.-Calcd. for C I-I BrO (percent): C, 47.09; H, 2.77. Found (percent): C, 47.29; H, 2.81.

6 EXAMPLE 13 7-chloro-3-(hydroxymethyl)chromone This material was prepared by reacting a solution of 14 g. of 4'-chloro-2'-hydroxy-2-(methylsulfinyl)acetophenone in 200 ml. of H 0 containing 40 g. of K CO in analogous fashion to 6-chloro-3-(hydroxymethyl)chr0- mone. The material was recrystallized from absolute ethanol, M.P. 15759; yield 6 g. (47%).

Analysis.Calcd. for C1QH7C1O3 (percent): C, 57.03; H, 3.35. Found (percent): C, 57.06; H, 3.32.

EXAMPLE 14 3- (hydroxymethyl) -8-isopropylchromone To a solution of 28 g. of K CO in ml. of H 0 was added 10 g. of 2'-hydroxy-3'-isopropyl-2-(methylsulfinyl) acetophenone. The resulting suspension was then treated with stirring with 25 g. of formalin. A clear solution formed which on further stirring becomes cloudy and an oil precipitated out. The mixture was extracted 4 times with 25 ml. portions of CH CI and the combined CHzClz extracts were dried over Na SO and taken down to a gum under reduced pressure. The gum was taken up in 50 m1. of toluene and the solution boiled for /2 hour. On cooling, crystals formed. The crystals were filtered and recrystallized from toluene, M.P. 121-23; yield 4 g. (44%).

Analysis.-Calcd. for C H O (percent): C, 71.54; H, 6.47. Found (percent): C, 71.71; H, 6.46.

EXAMPLE 15 O CH: O

CHzOH 3- (hydroxymethyl) -7-methoxychromone This was prepared by reacting 2 g. of 2'-hydroxy-6'- methoxy-Z-(methylsulfinyl)acetophenone with 5.1 ml. of formalin in analogous fashion to the preparation of 3-(hydroxymethyl) -8-isopropylchromone. The material was recrystallized from absolute ethanol, M.P. 1175- 0.; yield 0.5 g. (29% Analysis.-Calcd. for C H Q; (percent): C, 64.07; H, 4.89. Found (percent): C, 64.28; H, 4.79.

EXAMPLE 16 OCH;

HgOH

3-(hydroxymethyl)-8-methoxychromone This material was prepared by reacting a solution of 13.5 g. of 2-hydroxy-3'-methoxy-2-(methylsulfinyl)acetophenone in 200 ml. of H 0 containing 40 g. of K CO with 35 ml. of formalin in an analogous fashion to 3-(hy- 7 droxymethyl) -8-isopropyl chromone. The material was recrystallized from absolute ethanol, M.P. 16668; yield 6 g. (50%).

Analysis.-Calcd. for C H O (percent): C, 64.07; H, 4.89. Found (percent): C, 63.88; H, 4.97.

EXAMPLE 17 CHZO H 8-chloro-3-(hydroxymethyl)chromone This was prepared by reacting a solution of 14 g. of 3 chlor0-2'-hydroxy-2-(methylsulfinyl)acetophenone in 200 ml. of H 0 containing 40 g. of K CO with 34 ml. of formalin in an analogous fashion to 3-(hydroxymethyl)-8-isopropylchromone. The material was recrystallized from absolute ethanol, M.P. 158-62"; yield 6 g. (47%).

Analysis.Calcd. for C H Clo (percent): C, 57.03; H, 3.35. Found (percent): C, 57.18; H, 3.34.

EXAMPLE 18 o 0 CHaii-N- L onion Y 0 7 -acetamido-3- hydroxymethyl) chromone To a solution of 23.5 g. of K CO in 120 ml. of H 0 is added 9 g. of 4'-acetamido-2'-hydroxy-2-(methylsulfinyl)acetophenone. The solution is then treated with 20 ml. of formalin and after about mins. stirring, the crystalline precipitate that forms is filtered, Washed with cold H 0, and recrystallized from acetone. The crystalline product is taken up in ml. of dimethyl formamide and the solution boiled for 15 min. The solution is diluted to 125 ml. with CH CN, and on chilling crystals deposited. The crystals are filtered and recrystallized from CH CN, M.P. 254-58;yield 1 g. 12%

Analysis.-Calcd. for C H NO (percent): C, 61.80; H, 4.75; N, 6.01. Found (percent): C, 61.97; H, 4.80; N, 6.02.

EXAMPLE 19 6, 8-dibromo-3 (hydroxymethyl chromone To a solution of 8 g. of K CO in 40 ml. of H 0 is added 4.2 g. of 3,5-dibromo-2'-hydroxy-2-(methylsulfinyl)acetophenone. The solution is then treated with 6.8 ml. of formalin and stirred for 15 min. A gum precipitates. The supernatant liquid is decanted, and the gum washed with cold H O by decantation and then triturated with cold CH OH, causing it to solidify. The solid is filtered, washed with cold CH OH, and suspended in 20 ml. of toluene. This is boiled for 15 min. The resulting solution is cooled and the crystalline precipitate is filtered off, washed with cold toluene, and recrystallized from absolute ethanol, M.P. 16669; yield 0.5 g. (12.5%).

. Analysis.Calcd. for C H Br 0 (percent): C, 35.96; H, 1.81. Found (percent): C, 35.98; H, 1.87.

8 EXAMPLE 20 3- (hydroxymethyl benzo [h] chromone A mixture of 2.0 g. (0.0081 mole) of 1'-hydroxy-2- (methylsulfinyl)-2'-acetonaphth0ne, 2.63 g. (0.032 mole) of 37% aqueous formaldehyde, 20 ml. of methanol and 10 g. potassium carbonate was warmed to 50 for 5 minutes. Water (50 ml.) was added and the reaction was again warmed at 50 for 5 minutes. Additional potassium carbonate was added to salt out organic layer. Some of the methanol was stripped off and the mixture was extracted with 30 ml. toluene and ml. of methylene chloride. The solution was dried over potassium carbonate, filtered and stripped of methylene chloride. The remaining toluene solution was refluxed for one-half hour. On cooling, yellow crystals separated. Wt. 0.5 g. (27%) M.P. 162--4 C. Recrystallization from ethyl acetate gave pure material, M.P. 163-5 C.

Analysis.Calcd. for C H O (percent): C, 74.33; H, 4.46. Found (percent): C, 74.42; H, 4.49.

EXAMPLE 21 I F CH2O H 6-fluoro-3-(hydroxymethyl)chromone This compound was prepared by allowing to react, a solution of 13 g. of 5'-fluoro-2-(methylsulfinyl)acetophenone in 400 ml. of H 0 and 40 g. of K CO with 34 ml. of formalin in analogous fashion to 6-bromo-3-(hydroxymethyl)chromone. The material was recrystallized from abs. ethanol; M.P. 153-156"; yield 3.5 g. (30%).

Analysis.Calcd. for c mFo, (percent): C, 61.86; H, 3.63. Found (percent): C, 61.63; H, 3.61.

EXAMPLE 22 3 (hydroxymethyl -4-naphthol [2,3-b] pyran-4-one A solution of 20.0 g. (0.081 mole) of 3'-hydroxy-2- (methylsulfinyl)-2-acetonaphthone, 400 ml. of methanol, 19.71 g. (0.24 mole) of 37% formaldehyde and 20 drops of piperidine was maintained at reflux for 15 minutes and concentrated. Toluene (300 ml.) was added to the residue and the mixture was heated to reflux. The resulting solution was decanted from a small amount of undis solved material and reheated to reflux for /2 hr. Crystals separated from the cooled solution; Wt., 5.4 g. (30% M.P. 165l68. Recrystallization from toluene gave pure, orange crystals; M.P. 174176.

Analysis.Calcd. for C H O (percent): C, 74.33; H, 4.46. Found (percent): C, 74.52; H, 4.60.

EXAMPLE 23 cipitated out. The mixture was extracted three times with 50 ml. portions of CH Cl Combined extracts were dried over Na SO and concentrated to a guru under reduced pressure. The gum was taken up in 100 ml. of xylene, and the solution was boiled for 15 min. The xylene solution was evaporated at reduced pressure and the mixture was recrystallized from Skelly B. M.P. 9910l; yield 2.5 g. (14.5

Analysis.--Calcd. for C H O (percent): C, 74.97; H, 8.39. Found (percent): C, 75.26; H. 8.57.

EXAMPLE 24 3- (hydroxymethyl)-8-phenylchromone To a solution of 40 g. of K CO in 400 ml. of H was added 16.46 g. of 2'-hydroxy-2-(methylsulfinyl)-3- phenylacetophenone. The stirred suspension was treated with 34 m1. of formalin, and a clear solution formed. After 10 min. a gum started to come out of solution. The mixture was stirred for an additional 15 min. and extracted times with 100 ml. portions of CH Cl Combined extracts were dried over Na SO and evaporated to a solid residue under reduced pressure. The residue was taken up in 100 ml. of toluene, and the mixture boiled for 30 min. The resulting solution was chilled, and the crystalline precipitate that formed was filtered off, and recrystallized from benzene; M.P. 105-107 yield 4 g. (27% Analysis.-Calcd. for C I-1 0 (percent): C, 76.18; H, 4.79. Found (percent): C, 76.07; H, 4.83.

EXAMPLE 25 CHzOH 3-(hydroxymethyl)-8-methylchromone 10 ene, and the mixture boiled for /2 hour. The resulting solution was chilled and the crystals that formed filtered ofi. and recrystallized from absolute ethanol: M.P. 142- 144; yield 9.5 g. (53%).

Analysis.-Calcd. for C H O (percent): C, 69.46; H, 5.30. Found (percent): C, 69.56; H, 5.49.

EXAMPLE 2 6 CH3 CHBOH o C|H3 3-(hydroxymethyl) -6,8-dimethylchromone To a solution of 60 g. of K CO in 600 ml. of H 0 Was added with stirring 20.75 g. of 2'-hydroxy-3',5'-dimethyl-Z-(methylsulfinyl)acetophenone. The suspension was treated with 51 ml. of formalin, and a clear solution was obtained. After 10 min. stirring an oil separated out which solidified. The mixture was chilled, and the solid filtered, washed with cold H 0, and suspended in 375 ml. of toluene. The mixture was boiled for 30 min. and the resulting solution chilled. A crystalline precipitate formed. This was filtered, and recrystallized from CH CN; M.P. 180.5-183;yield 11.5 g. (63%).

Analysis.-Calcd. for C H O (percent): C, 70.57; H, 5.92. Found (percent): C, 70.40; H, 6.07.

EXAMPLE 27 onion 3- (hydroxymethyl -6-phenylchromone To a solution of 40 g. of K CO in 400 ml. of H 0 was added 16.4 g. of 2'-hydroxy-2-(methylsulfinyl)-5'-phenylacetophenone. The resulting yellow solution was treated with 64 ml. of formalin with stirring. After 10 min. a heavy oil deposited. The mixture was extracted 3 times with ml. portions of CHCl Combined extracts were dried over Na SO and concentrated to an oil under reduced pressure. The oil was taken up in 200 ml. of toluene, and the solution boiled for 30 min. On cooling crystals deposited. The crystals were filtered, and recrystallized from benzene, M.P. 1305-132"; yield 5 g. (33%).

Analysis.Calcd. for C H 0 (percent): C, 76.19; H, 4.80. Found (percent): C, 76.03; H, 4.93.

EXAMPLE 28 O CHsO CHzOH cm i 3- (hydroxymethyl) -5 ,7-dimethoxychromone This compound was prepared by allowing to react a solution of 15.5 g. of 4',6'-dimethoxy-2-hydroxy-2-(methylsulfinyl)acetophenone in 400 ml. of H 0 and 40 g. of K CO with 34 ml. of formalin in analogous fashion to 6-bromo-3-(hydroxymethyl)chromone. The compound was recrystallized from CH CN, M.P. -153.5; yield 4.5 g. (32%).

Analysis.-Calcd. for C H O (percent): C, 61.01; H, 5.12. Found (percent): C, 60.93; H, 5.12.

1 1 EXAMPLE 29 W CHzOH SI 0 H3 0 3- (hydroxymethyl) -6-methyl-3- (methylsulfinyl) -4- chromanone 3-(hydroxymethyl)-6-methylchromone This compound was prepared by allowing to react a solution of 12.72 g. of 2'-hydroxy-5'-methyl-2-(methylsulfinyl)acetophenone in 400 ml. of H 0 and 40 g. of K CO with 34 ml. of formalin in analogous fashion to 6-bromo-3-(hydroxymethyl)chrome. The material was recrystallized from methanol, M.P. 143-147"; yield 4.5 g. (39%).

Analysis..Calcd. for C H O (percent): C, 69.46; H, 5.30. Found (percent): C, 69.21; H, 5.30.

EXAMPLE 3 1 CHaO CH; 0 H

B-(hydroxymethyl)-5-methoxychromone To a solution of 14 g. of 2'-hydroxy 6' methoxy-Z- (methylsulfinyl)acetophenone in 200 ml. of H 0 containing 40 g. of K CO was added 34 ml. of formalin, and the solution stirred for 10 min. An oil separated out, and the mixture was extracted three times with 50 ml. portions of CHzClg. Combined extracts were dried over Na SO and concentrated to an oil under reduced pressure. The oil was taken up in 250 ml. of toluene, and the mixture boiled for 30 min. On cooling, crystals formed. These were filtered and recrystallized from ethylacetate; M.P. 155-156; yield 3 g. (25%).

Analysis.Calcd. for C H O (percent): C, 64.07; H, 4.89. Found (percent): C, 63.81; H, 4.94.

EXAMPLE 32 (CH3)3C CH30 H 6,8-di-tert-butyl-3 hydroxymethyl) chromone To a solution of 40 g. of K CO in 300 ml. of H 0 was added with Stirring 18.6 g. of 3', '-ditertbutyl-2'-hydroxy- 2- (methylsulfinyl)acetophenone. The resulting suspension was treated with 64 ml. of formalin which resulted in an almost clear solution. After 15 min. of stirring, an oil separated out. The mixture was extracted three times with ml. portions of CHCl Combined extracts were dried over Na SO and concentrated to an oil under reduced pressure. The oil was taken up in ml. of toluene, and the mixture boiled for 30 min. 0n cooling, crystals formed. The crystals were filtered oif, and recrystallized from ethylacetate; M.P. 156-158"; yield 5 g. (29%).

Analysis.Calcd. for C H O (percent): C, 74.97; H, 8.39. Found (percent): C, 74.68; H, 8.54.

We claim:

1. A compound of the formula:

wherein R and R are each a member selected from a group consisting of hydrogen, lower alkyl of 1 to 6 carbon atoms, halogen, earbocyclic aryl of 6 to 8 carbon atoms, aryl lower alkyl in which aryl and lower alkyl are as defined, alkoxy of from 1 to 6 carbon atoms, hydroxy, acylamino in which acyl is alkanoyl of less than 12 carbon atoms, and R and R taken together form an aryl ring in which aryl is as defined.

2. A compound according to claim 1 which is 3-(hydroxymethyl) chromone.

3. A compound according to claim 1 which is 6-hydroxy-3-(hydroxymethyl) chromone.

4. A compound according to claim 1 which is 6-chloro- 3-(hydroxymethyl)chromone.

5. A compound according to claim 1 which is 3-(hydroxymethyl) -6-iodochromone.

6. A compound according to claim 1 which is 3-(hydroxymethyl)-6-methoxychromone.

7. A compound according to claim 1 which is 6-bromo- 3 (hydroxymethyl) chromone.

8. A compound according to claim 1 which is 7-chloro- 3- (hydroxymethyl) chromone.

9. A compound according to claim 1 which is 3-(hydroxymethyl)-8-isopropylchromone.

10. A compound according to claim 1 which is 3-(hydroxymethyl)-7-methoxychromone.

11. A compound according to claim 1 which is 3-(hydroxymethyl)-8-methoxychromone.

12. A compound according to claim 1 which is 8- chloro-3- (hydroxymethyl) chromone.

13. A compound according to claim 1 which is 7-acetamido-3 (hydroxymethyl) chromone.

14. A compound according to claim 1 which is 6,8-dibromo-3- (hydroxymethyl) chromone.

15. A compound according to claim 1 which is 3-(hydroxymethyl) benzo [h] chromone.

16. A compound according to claim 1 which is fi-fluoro- 3- (hydroxymethyl) chromone.

17. A compound according to claim 1 which is 3-(hydroxymethyl -4-naphtho [2, 3-b pyran-4-one.

18. A compound according to claim 1 which is 3-(hydroxymethyl) -6- 1,1,3,3-tetramethylbutyl)chromone.

19. A compound according to claim 1 which is 3-(hydroxymethyl)-8-phenylchromone.

20. A compound according to claim 1 which is 3-(hydroxymethyl)-8-methylchromone.

21. A compound according to claim 1 which is 3-(hydroxymethyl)-6,8-dimethylchromone.

13 14 22. A compgunld aclcolrding to claim 1 which is 3-(hy- References Cited droxymethyD- -p enyc romone.

23. A compound according to claim 1 which is 3-(hy- UNITED STATES PATENTS droxymethyl) 5,7 dimethoxychromone 3,699,128 10/1972 Von Standtmann 260-3452 24. A compound according to claim 1 which is S-(hydroxymethyl) 6 methy1chromone. 5 JOHN M. FORD, Primary Examiner 25. A compound according to claim 1 which is 3-(hydroxymethyl)-5-methoxychromone.

26. A compound according to claim 1 which is 6,8-ditert-buty1-3-(hydroxymethyl)chromone. 10

US. Cl. X.R. 424283 

